Search & Filtering
Human blood typically contains 1.04 kg/L of platelets. A 1.01 pints of blood would contain what mass (in grams) of platelets? (1 gallon = 3.785 L, 1 gallon = 8 pints).
solid is dissolved in a small amount of deionized water then transferred to a 250 mL volumetric flask.
The solution is brought to a volume of 250.0 mL with deionized water and mixed. The molar mass of
(NH4)2Fe(SO4)2∙6H2O is 392.15 g/mol.
a. Calculate the molarity of (NH4)2Fe(SO4)2∙6H2O in this stock solution.
b. Calculate the molarity of Fe2+ in this stock solution.
c. Calculate the concentration of Fe2+ in the stock solution in units of g/L.
d. Calculate the concentration of Fe2+ in the stock solution in units of μg/dL.
A typical protein contains 16wt.% Nitrogen. A 0.500ml aliquot of protein solution was digested and the liberated NH_(3) was diluted into 10.00ml of 0.02140mol HCL. Unreacted HCL require 3.26ml of 0.0198mol of NaOH for complete titration. Find the concentration of protein in the original sample.
Carl Lewis , a sprinter in the 1988 Olympic Games, ran the 100 meter dash in 8.90 sec. what was his speed in miles per hour ?
Calculate the number of grams of aluminum sulfate that could sulfate be obtained by the action of 12.5 grams of aluminum on a excess of sulfuric acid.
2 Al + 3H2SO4 --> Al2(SO4)3 + 3H2
A 30.14-g stainless steel ball bearing at 117.82°C is
placed in a constant-pressure calorimeter containing 120.0
mL of water at 18.44°C. If the specific heat of the ball
bearing is 0.474 J/gC°, calculate the final temperature of
the water. Assume the calorimeter to have negligible heat
capacity.
phosphorus (P4) burns in air according to the equation:
P4(s) + 5O2(g)
A 100-g metal at 110°C is placed in a constant-pressure
calorimeter containing 120-g of water at 18°C. If the
specific heat of the metal is 0.57 J/gC°, and the calorimeter
is 300 grams at 18°C initially with an average specific heat
of 0.30 J/gC°. Calculate the final temperature of the water.
